There is no need to delete anything. Just slow down a bit and give people time to participate before creating a new challenge.
I would suggest a new one once per week, or something like that... this will encourage multiple solutions/examples and also not take up too much of peoples spare time.
Good ideas though... I like how you have made them with some continuity and presented them with some funny pictures and captions
And yeah, everyone chill out... this isn't fag-chan or HL2world forums...
Here we make hug, not yell. Do not make me get all dissapoint. >.>